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(Nomaden n Gr. S. ALLEN 8v R, C. ILLRICH.l

SGRBW DRIVER.

Patented Nov. 27

UNITED STATES PATENT EEICE.

GEORGE S. ALLEN AND ROBERT C. ELLBICH, OF SOUTHIEGTON, CONN.

SCREW-DRIVER.

SPECIFICATION forming part of Letters Patent No. 289,056, dated November27, 1883,

To rtl-Z whom t may concern.-

Be it known that we, GEORGE S. ALLEN and ROBERT G. ELLEicH, citizens ofthe United States of America, residing at Southington, in the county ofHartford and State of Gonnecticut, have invented certain new and usefulImprovements in Screw-Drivers, of which the folio-Wing is aspecification, reference being had therein to the accompanying drawings,in Which- Figure l is a View of the screw-driver. Fig. 2 is a view oftheparts of the same before the parts are put together. Fig. 3 is alongitudinal and central section of the handle and bolster, and Fig. 4.is a crosssection of the bol` ster. Figs. 5 and 6 are views of a die,and Fig. 7 is a sectional view of the bolster.

Our invention relates to screw-drivers, and its object is an improvedarticle. The novelty is in the bolster, for the most part, and consistsin the means of fastening. the handle in the same.

To enable others to make our improved screw-driver, We will give adetailed description of the sanne and of its several parts.

That part of the shank Ain the bolster, and for some distance from it,is a round steel rod, and the remaining part is made in the usual form.The tapering 'bolster Bis cast onto the shank, and has the taperingsocket D, Fig. in which are the feathers a, Fig. 4, and the swell orenlargement C on its upper end, as shown in Fig. 2. r)Ehe part E of thehandle F which enters the socket has the notch b, and is tapering inopposite directions, as shown in Figs. 2 and 3. The other parts of thehandle are in the usual form. i

To put the bolster and handle together in our improved Way, it isrequisite that the bolster be made of a duct-ile metal, or of a suit-Applcation filed September 19, 1882. (No model.)

able alloy. A good alloy for the purpose, as it adheres with greattenacity to the shank, consists of tin, one hundred parts; antimony,fifteen parts; and copper, three parts. The handle may be driven intothe socket, and the swell on the bolster may be spun into the notch b onthe part E of the handle. A better and more expeditious Way is to placethe Vbolster in a die having a tapering hole correonto the Shanks, andthat various means of 6o fastening the handles to the holsters have beenused; but

What We claim as our invention, and desire to secure by Letters Patent,is-

A screw-driver having the shank A, provided with a soft or ductile metalbolster, B, cast thereon, said bolster being formed with enlargement Cat the open end, and a handle, F, having a depression, b, the Wholebeing constructed to be set in place and then fastened by the inwardswaging of the enlargement C, substantially as set forth.

In testimony whereof We affix our signatures in presence of twoWitnesses.

GEORGE S. ALLEN. ROBERT C. ELLRICH.

Vitnesses:

GEORGE TERRY, HIRAM A. GRAY.

